import pandas as pd
pd.set_option('display.unicode.east_asian_width',True)
df=pd.read_excel('城镇单位就业人员年平均工资.xlsx',sheet_name='按登记注册类型',index_col=0)
df.drop('数据来源：国家统计局',inplace=True)
print('增加后: \n',df)

df.loc['2001-2020年外商投资单位就业人员的年平均工资']=[112089,106604,99367,90064,82902,76302,69826,
                                      63171,55888,48869,41739,37101,34250,29594,26552,23625,
                                      22250,21016,19409,17553]
print('增加后: \n',df)
